I have this trouble in Firefox, and Safari, and Chrome. I can no longer open .pdf documennts on line in any browser configuration.

I have tried serveral browser versions and serveral Reader versions, same result. Running Mac OS 10.6.8, just after a full rebuild and this is the most annoying result.

I do have the above suggestion checked, which I believe is the default setting, as I was always able to use a single cilck to open all .pdf files. Noticed this first with download of most current Reader. Currently have 9.5.2.

It began when I installed most current version after the rebuild of the OS.